GB914438A - Improvements relating to measuring apparatus - Google Patents

Improvements relating to measuring apparatus

Info

Publication number
GB914438A
GB914438A GB33771/60A GB3377160A GB914438A GB 914438 A GB914438 A GB 914438A GB 33771/60 A GB33771/60 A GB 33771/60A GB 3377160 A GB3377160 A GB 3377160A GB 914438 A GB914438 A GB 914438A
Authority
GB
United Kingdom
Prior art keywords
light passes
cells
measuring apparatus
electric
improvements relating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB33771/60A
Inventor
Alexander Turnbull Shepherd
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferranti International PLC
Original Assignee
Ferranti PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferranti PLC filed Critical Ferranti PLC
Priority to GB33771/60A priority Critical patent/GB914438A/en
Priority to DEF34992A priority patent/DE1299894B/en
Priority to US141056A priority patent/US3154688A/en
Priority to CH1129961A priority patent/CH421531A/en
Publication of GB914438A publication Critical patent/GB914438A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/36—Forming the light into pulses
    • G01D5/38—Forming the light into pulses by diffraction gratings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • G01B21/06—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness specially adapted for measuring length or width of objects while moving
    • G01B21/065—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness specially adapted for measuring length or width of objects while moving for stretchable materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
    • G01D5/34715—Scale reading or illumination devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Transform (AREA)

Abstract

914,438. Electric selective signalling systems. FERRANTI Ltd. Sept. 27, 1961 [Oct. 1, 1960], No. 33771/60. Class 40 (1). A Moire fringe type displacement measuring system in which a plurality of phase-displaced photo-electric cells P1, P2, P3, P4, Fig. 1 (side elevation) and Fig. 2 (plan) sense crossed reflective and transmissive diffraction gratings 12, 14, is characterized in that each incident beam of light passes adjacent to the cell to which it is destined to be reflected. This arrangement reduces parallex errors which are introduced when all the incident light passes to one side of the group of cells. Specifications 760,321 and 810,478 are referred to.
GB33771/60A 1960-10-01 1960-10-01 Improvements relating to measuring apparatus Expired GB914438A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB33771/60A GB914438A (en) 1960-10-01 1960-10-01 Improvements relating to measuring apparatus
DEF34992A DE1299894B (en) 1960-10-01 1961-09-23 Measuring device for determining the relative movement of two objects
US141056A US3154688A (en) 1960-10-01 1961-09-27 Displacement measuring apparatus using a reflective grating and plural photocells
CH1129961A CH421531A (en) 1960-10-01 1961-09-28 Measuring device for determining the size and direction of the movement of an object

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33771/60A GB914438A (en) 1960-10-01 1960-10-01 Improvements relating to measuring apparatus

Publications (1)

Publication Number Publication Date
GB914438A true GB914438A (en) 1963-01-02

Family

ID=10357232

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33771/60A Expired GB914438A (en) 1960-10-01 1960-10-01 Improvements relating to measuring apparatus

Country Status (4)

Country Link
US (1) US3154688A (en)
CH (1) CH421531A (en)
DE (1) DE1299894B (en)
GB (1) GB914438A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1260168B (en) * 1964-01-11 1968-02-01 Philips Nv Device for photoelectrically determining the position of a movable component in relation to a fixed arrangement using a light beam
GB2194042A (en) * 1986-08-14 1988-02-24 Bicc Plc Displacement measurement

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3555285A (en) * 1966-04-29 1971-01-12 Bunker Ramo Coded arrangement of photocells mounted on rigid body to determine position thereof
GB1363411A (en) * 1970-07-01 1974-08-14 Nat Res Dev Position indicating or measuring devices
JPS4824480U (en) * 1971-07-17 1973-03-22
US4044847A (en) * 1976-01-30 1977-08-30 Pitney-Bowes, Inc. Weighing system with a moire optoelectronic transducer
US4097734A (en) * 1977-02-09 1978-06-27 Keuffel & Esser Company Zero index for electro-optical measuring device
US4330212A (en) * 1978-12-18 1982-05-18 Grumman Aerospace Corporation Triaxis laser alignment system and method
GB8615197D0 (en) * 1986-06-21 1986-07-23 Renishaw Plc Opto-electronic scale reading apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2406299A (en) * 1940-12-28 1946-08-20 Genevoise Instr Physique Machine tool with photoelectric positioning of the work table
US2311101A (en) * 1941-03-06 1943-02-16 Eastman Kodak Co Densitometer
DE876162C (en) * 1941-04-30 1953-05-11 Genevoise Instr Physique Photoelectric precision device for setting a moving object in a precisely predetermined position
GB616831A (en) * 1946-05-23 1949-01-27 William Ewart Stanley Improvements in or relating to stop motions or signalling devices for knitting machines and the like
US2886717A (en) * 1953-03-14 1959-05-12 Ferranti Ltd Measuring apparatus
DE1060609B (en) * 1955-05-31 1959-07-02 Ferranti Ltd Measuring device for precisely determining the size and direction of the movements of an object relative to a fixed reference system
DE1044950B (en) * 1958-04-02 1958-11-27 Landis & Gyr Ag Photoelectric scanning device for the calibration of electricity meters

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1260168B (en) * 1964-01-11 1968-02-01 Philips Nv Device for photoelectrically determining the position of a movable component in relation to a fixed arrangement using a light beam
GB2194042A (en) * 1986-08-14 1988-02-24 Bicc Plc Displacement measurement

Also Published As

Publication number Publication date
CH421531A (en) 1966-09-30
US3154688A (en) 1964-10-27
DE1299894B (en) 1969-07-24

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